title: 2-(4-Methyl-pyridin-2-yl)-4',4',6',6'-tetra-kis-(pyrrolidin-1-yl)-1H,2H-spiro-[naphtho-[1,2-e][1,3,2]oxaza-phosphinine-3,2'-[1,3,5,2,4,6]tri-aza-triphosphinine].
abstract: In the title spiro-phosphazene derivative, C33H46N9OP3, the phosphazene and six-membered N/O rings are in flattened chair and twisted-boat conformations, respectively. The naphthalene ring system and the pyridine ring are oriented at a dihedral angle of 41.82 (4)°. In the crystal, weak C-H⋯O hydrogen bonds link the mol-ecules related by translation along the a axis into chains. C-H⋯π inter-actions aggregate these chains into layers parallel to the ab plane.
authors.affiliation: Department of Chemistry, Kırıkkale University, 71450 Kırıkkale, Turkey.
authors.forename: Muhammet
authors.initials: M
authors.lastname: Işıklan
authors.forename: Omer
authors.initials: O
authors.lastname: Sonkaya
authors.forename: Tuncer
authors.initials: T
authors.lastname: Hökelek